Split DirectCompositionSurfaceWin into two parts.

gpu/ipc/service/direct_composition_child_surface_win.cc

Index: gpu/ipc/service/direct_composition_child_surface_win.cc
diff --git a/gpu/ipc/service/direct_composition_child_surface_win.cc b/gpu/ipc/service/direct_composition_child_surface_win.cc
new file mode 100644
index 0000000000000000000000000000000000000000..48f65af993ecd275999d7ce485e6c1c8d32e6f6b
--- /dev/null
+++ b/gpu/ipc/service/direct_composition_child_surface_win.cc
@@ -0,0 +1,315 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "gpu/ipc/service/direct_composition_child_surface_win.h"
+
+#include <d3d11_1.h>
+#include <dcomptypes.h>
+
+#include "base/memory/ptr_util.h"
+#include "base/metrics/histogram_macros.h"
+#include "base/optional.h"
+#include "base/synchronization/waitable_event.h"
+#include "base/trace_event/trace_event.h"
+#include "ui/display/display_switches.h"
+#include "ui/gfx/native_widget_types.h"
+#include "ui/gl/egl_util.h"
+#include "ui/gl/gl_angle_util_win.h"
+#include "ui/gl/gl_context.h"
+#include "ui/gl/gl_surface_egl.h"
+#include "ui/gl/scoped_make_current.h"
+
+#ifndef EGL_ANGLE_flexible_surface_compatibility
+#define EGL_ANGLE_flexible_surface_compatibility 1
+#define EGL_FLEXIBLE_SURFACE_COMPATIBILITY_SUPPORTED_ANGLE 0x33A6
+#endif /* EGL_ANGLE_flexible_surface_compatibility */
+
+#ifndef EGL_ANGLE_d3d_texture_client_buffer
+#define EGL_ANGLE_d3d_texture_client_buffer 1
+#define EGL_D3D_TEXTURE_ANGLE 0x33A3
+#endif /* EGL_ANGLE_d3d_texture_client_buffer */
+
+namespace gpu {
+
+namespace {
+// Only one DirectComposition surface can be rendered into at a time. Track
+// here which IDCompositionSurface is being rendered into. If another context
+// is made current, then this surface will be suspended.
+IDCompositionSurface* g_current_surface;
+
+class ScopedReleaseCurrent {

[sunnyps, 2017/06/10 00:11:11]

nit: This is duplicated both here and in the root surface. Can you move this to
ui/gl/scoped_make_current.h?

+ public:
+  explicit ScopedReleaseCurrent(gl::GLSurface* this_surface) {
+    gl::GLContext* current_context = gl::GLContext::GetCurrent();
+    bool was_current =
+        current_context && current_context->IsCurrent(this_surface);
+    if (was_current) {
+      make_current_.emplace(current_context, this_surface);
+      current_context->ReleaseCurrent(this_surface);
+    }
+  }
+
+ private:
+  base::Optional<ui::ScopedMakeCurrent> make_current_;
+};
+}
+
+DirectCompositionChildSurfaceWin::DirectCompositionChildSurfaceWin(
+    const gfx::Size& size,
+    bool has_alpha,
+    bool enable_dc_layers)
+    : gl::GLSurfaceEGL(),
+      size_(size),
+      has_alpha_(has_alpha),
+      enable_dc_layers_(enable_dc_layers) {}
+
+DirectCompositionChildSurfaceWin::~DirectCompositionChildSurfaceWin() {
+  Destroy();
+}
+
+bool DirectCompositionChildSurfaceWin::Initialize(gl::GLSurfaceFormat format) {
+  d3d11_device_ = gl::QueryD3D11DeviceObjectFromANGLE();
+  dcomp_device_ = gl::QueryDirectCompositionDevice(d3d11_device_);
+  if (!dcomp_device_)
+    return false;
+
+  EGLDisplay display = GetDisplay();
+
+  std::vector<EGLint> pbuffer_attribs;
+  pbuffer_attribs.push_back(EGL_WIDTH);
+  pbuffer_attribs.push_back(1);
+  pbuffer_attribs.push_back(EGL_HEIGHT);
+  pbuffer_attribs.push_back(1);
+
+  pbuffer_attribs.push_back(EGL_NONE);
+  default_surface_ =
+      eglCreatePbufferSurface(display, GetConfig(), &pbuffer_attribs[0]);
+  CHECK(!!default_surface_);
+
+  return true;
+}
+
+void DirectCompositionChildSurfaceWin::ReleaseCurrentSurface() {
+  ReleaseDrawTexture(true);
+  dcomp_surface_.Reset();
+  swap_chain_.Reset();
+}
+
+void DirectCompositionChildSurfaceWin::InitializeSurface() {
+  TRACE_EVENT1("gpu", "DirectCompositionChildSurfaceWin::InitializeSurface()",
+               "enable_dc_layers_", enable_dc_layers_);
+  DCHECK(!dcomp_surface_);
+  DCHECK(!swap_chain_);
+  DXGI_FORMAT output_format =
+      base::CommandLine::ForCurrentProcess()->HasSwitch(switches::kEnableHDR)
+          ? DXGI_FORMAT_R16G16B16A16_FLOAT
+          : DXGI_FORMAT_B8G8R8A8_UNORM;
+  if (enable_dc_layers_) {
+    // Always treat as premultiplied, because an underlay could cause it to
+    // become transparent.
+    HRESULT hr = dcomp_device_->CreateSurface(
+        size_.width(), size_.height(), output_format,
+        DXGI_ALPHA_MODE_PREMULTIPLIED, dcomp_surface_.GetAddressOf());
+    has_been_rendered_to_ = false;
+    CHECK(SUCCEEDED(hr));
+  } else {
+    DXGI_ALPHA_MODE alpha_mode =
+        has_alpha_ ? DXGI_ALPHA_MODE_PREMULTIPLIED : DXGI_ALPHA_MODE_IGNORE;
+    base::win::ScopedComPtr<IDXGIDevice> dxgi_device;
+    d3d11_device_.CopyTo(dxgi_device.GetAddressOf());
+    base::win::ScopedComPtr<IDXGIAdapter> dxgi_adapter;
+    dxgi_device->GetAdapter(dxgi_adapter.GetAddressOf());
+    base::win::ScopedComPtr<IDXGIFactory2> dxgi_factory;
+    dxgi_adapter->GetParent(IID_PPV_ARGS(dxgi_factory.GetAddressOf()));
+
+    DXGI_SWAP_CHAIN_DESC1 desc = {};
+    desc.Width = size_.width();
+    desc.Height = size_.height();
+    desc.Format = output_format;
+    desc.Stereo = FALSE;
+    desc.SampleDesc.Count = 1;
+    desc.BufferCount = 2;
+    desc.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
+    desc.Scaling = DXGI_SCALING_STRETCH;
+    desc.SwapEffect = DXGI_SWAP_EFFECT_FLIP_SEQUENTIAL;
+    desc.AlphaMode = alpha_mode;
+    desc.Flags = 0;
+    HRESULT hr = dxgi_factory->CreateSwapChainForComposition(
+        d3d11_device_.Get(), &desc, nullptr, swap_chain_.GetAddressOf());
+    has_been_rendered_to_ = false;
+    first_swap_ = true;
+    CHECK(SUCCEEDED(hr));
+  }
+}
+
+void DirectCompositionChildSurfaceWin::ReleaseDrawTexture(bool will_discard) {
+  if (real_surface_) {
+    eglDestroySurface(GetDisplay(), real_surface_);
+    real_surface_ = nullptr;
+  }
+  if (draw_texture_) {
+    draw_texture_.Reset();
+    if (dcomp_surface_) {
+      HRESULT hr = dcomp_surface_->EndDraw();
+      CHECK(SUCCEEDED(hr));
+    } else if (!will_discard) {
+      DXGI_PRESENT_PARAMETERS params = {};
+      RECT dirty_rect = swap_rect_.ToRECT();
+      params.DirtyRectsCount = 1;
+      params.pDirtyRects = &dirty_rect;
+      swap_chain_->Present1(first_swap_ ? 0 : 1, 0, &params);
+      if (first_swap_) {
+        // Wait for the GPU to finish executing its commands before
+        // committing the DirectComposition tree, or else the swapchain
+        // may flicker black when it's first presented.
+        base::win::ScopedComPtr<IDXGIDevice2> dxgi_device2;
+        HRESULT hr = d3d11_device_.CopyTo(dxgi_device2.GetAddressOf());
+        DCHECK(SUCCEEDED(hr));
+        base::WaitableEvent event(
+            base::WaitableEvent::ResetPolicy::AUTOMATIC,
+            base::WaitableEvent::InitialState::NOT_SIGNALED);
+        dxgi_device2->EnqueueSetEvent(event.handle());
+        event.Wait();
+        first_swap_ = false;
+      }
+    }
+  }
+  if (dcomp_surface_ == g_current_surface)
+    g_current_surface = nullptr;
+}
+
+void DirectCompositionChildSurfaceWin::Destroy() {
+  if (default_surface_) {
+    if (!eglDestroySurface(GetDisplay(), default_surface_)) {
+      DLOG(ERROR) << "eglDestroySurface failed with error "
+                  << ui::GetLastEGLErrorString();
+    }
+    default_surface_ = nullptr;
+  }
+  if (real_surface_) {
+    if (!eglDestroySurface(GetDisplay(), real_surface_)) {
+      DLOG(ERROR) << "eglDestroySurface failed with error "
+                  << ui::GetLastEGLErrorString();
+    }
+    real_surface_ = nullptr;
+  }
+  if (dcomp_surface_ && (dcomp_surface_ == g_current_surface)) {
+    HRESULT hr = dcomp_surface_->EndDraw();
+    CHECK(SUCCEEDED(hr));
+    g_current_surface = nullptr;
+  }
+  draw_texture_.Reset();
+  dcomp_surface_.Reset();
+}
+
+gfx::Size DirectCompositionChildSurfaceWin::GetSize() {
+  return size_;
+}
+
+bool DirectCompositionChildSurfaceWin::IsOffscreen() {
+  return false;
+}
+
+void* DirectCompositionChildSurfaceWin::GetHandle() {
+  return real_surface_ ? real_surface_ : default_surface_;
+}
+
+gfx::SwapResult DirectCompositionChildSurfaceWin::SwapBuffers() {
+  ReleaseDrawTexture(false);
+  return gfx::SwapResult::SWAP_ACK;
+}
+
+bool DirectCompositionChildSurfaceWin::FlipsVertically() const {
+  return true;
+}
+
+bool DirectCompositionChildSurfaceWin::SupportsPostSubBuffer() {
+  return true;
+}
+
+bool DirectCompositionChildSurfaceWin::OnMakeCurrent(gl::GLContext* context) {
+  if (g_current_surface != dcomp_surface_) {
+    if (g_current_surface) {
+      HRESULT hr = g_current_surface->SuspendDraw();
+      CHECK(SUCCEEDED(hr));
+      g_current_surface = nullptr;
+    }
+    if (draw_texture_) {
+      HRESULT hr = dcomp_surface_->ResumeDraw();
+      CHECK(SUCCEEDED(hr));
+      g_current_surface = dcomp_surface_.Get();
+    }
+  }
+  return true;
+}
+
+bool DirectCompositionChildSurfaceWin::SupportsDCLayers() const {
+  return true;
+}
+
+bool DirectCompositionChildSurfaceWin::SetDrawRectangle(
+    const gfx::Rect& rectangle) {
+  if (draw_texture_)
+    return false;
+  DCHECK(!real_surface_);
+  ScopedReleaseCurrent release_current(this);
+
+  if ((enable_dc_layers_ && !dcomp_surface_) ||
+      (!enable_dc_layers_ && !swap_chain_)) {
+    ReleaseCurrentSurface();
+    InitializeSurface();
+  }
+
+  if (!gfx::Rect(size_).Contains(rectangle)) {
+    DLOG(ERROR) << "Draw rectangle must be contained within size of surface";
+    return false;
+  }
+  if (gfx::Rect(size_) != rectangle && !has_been_rendered_to_) {
+    DLOG(ERROR) << "First draw to surface must draw to everything";
+    return false;
+  }
+
+  CHECK(!g_current_surface);
+
+  RECT rect = rectangle.ToRECT();
+  if (dcomp_surface_) {
+    POINT update_offset;
+    HRESULT hr = dcomp_surface_->BeginDraw(
+        &rect, IID_PPV_ARGS(draw_texture_.GetAddressOf()), &update_offset);
+    draw_offset_ = gfx::Point(update_offset) - gfx::Rect(rect).origin();
+    CHECK(SUCCEEDED(hr));
+  } else {
+    HRESULT hr =
+        swap_chain_->GetBuffer(0, IID_PPV_ARGS(draw_texture_.GetAddressOf()));
+    swap_rect_ = rectangle;
+    draw_offset_ = gfx::Vector2d();
+    CHECK(SUCCEEDED(hr));
+  }
+  has_been_rendered_to_ = true;
+
+  g_current_surface = dcomp_surface_.Get();
+
+  std::vector<EGLint> pbuffer_attribs{
+      EGL_WIDTH,
+      size_.width(),
+      EGL_HEIGHT,
+      size_.height(),
+      EGL_FLEXIBLE_SURFACE_COMPATIBILITY_SUPPORTED_ANGLE,
+      EGL_TRUE,
+      EGL_NONE};
+
+  EGLClientBuffer buffer =
+      reinterpret_cast<EGLClientBuffer>(draw_texture_.Get());
+  real_surface_ = eglCreatePbufferFromClientBuffer(
+      GetDisplay(), EGL_D3D_TEXTURE_ANGLE, buffer, GetConfig(),
+      &pbuffer_attribs[0]);
+
+  return true;
+}
+
+gfx::Vector2d DirectCompositionChildSurfaceWin::GetDrawOffset() const {
+  return draw_offset_;
+}
+
+}  // namespace gpu